目的:在本研究中,分析了来自巴西东北海岸的代表四种不同物种的143种lutjanid鱼类的寄生虫。本研究的目的是提供对R.(I.)vicentei,从巴西的lutjanid鱼类中收集,包括使用扫描电子显微镜(SEM)首次观察该物种。
方法:线虫在新月甘油系列中发现澄清,被拍照和测量(以毫米为单位),和一些用于扫描电镜的标本。使用带有绘图管的光学显微镜制作插图。
结果:发现的线虫被鉴定为Raphidascaris(Ichthyascaris)vicentei,感染6.29%的检查鱼。详细的形态学分析揭示了在该物种中首次观察到的以下特征:唇乳头,狭窄的侧翼和雄性针状体的详细结构。这些贡献有助于填补文献中的空白,并扩大对这种寄生虫形态的认识。
结论:R的存在(I.)四个路德尼德物种中的vicentei可能表明宿主特异性低,突出了它对不同宿主的适应性。此外,给出了新的主机记录。这项研究提供了最全面的R.(I.)VICENTEI到目前为止,为更好地了解巴西东北沿海的寄生生物多样性提供重要见解,以及为未来研究该地区鱼类种群中这些寄生虫的生态和影响奠定基础。
OBJECTIVE: In this study, 143 lutjanid fishes representing four different species from the Northeast coast off Brazil were analyzed for parasites. The aim of the present study is to provide a detailed redescription of R. (I.) vicentei, collected from lutjanid fishes in Brazil, including the first observation of the species using scanning electron microscopy (SEM).
METHODS: Nematodes found clarified in a crescent glycerin series, were photographed and measured (in mm), and some specimens destined for SEM. The Illustrations were made using an optical microscope with a drawing tube.
RESULTS: Nematodes found were identified as Raphidascaris (Ichthyascaris) vicentei, infecting 6.29% of the examined fish. Detailed morphological analysis revealed the following characteristics observed for the first time in this species: labial papillae, narrow lateral alae and the detailed structure of male spicules. These contributions help filling the gaps in the literature and expand the knowledge of this parasite morphology.
CONCLUSIONS: The presence of R. (I.) vicentei in four lutjanid species may indicates low host specificity, highlighting its adaptability to different hosts. Furthermore, new host records are given. This research provides the most comprehensive morphological description of R. (I.) vicentei to date, generating crucial insights for a better understanding of the parasitic biodiversity off the Brazilian Northeastern coast of Brazil, as well as establishing foundation for future investigations on the ecology and impacts of these parasites in fish populations from this region.